Olivier Giroud has blamed the heat and humidity for Chelsea's loss to Kawasaki Frontale.

The Blues were downed 1-0 by their J-League opponents on Friday thanks to Leandro Damiao's late header.

And Giroud admits Chelsea struggled in trying conditions in Yokohama.

He said: “I don't know how the Japanese teams do it, it's very humid and very warm.

“Our fitness is not perfect but we're working hard."